饲料中不同EPA和DHA含量对黄鳝脂类代谢、生长及繁殖性能的影响  

THE EFFECTS OF DIFFERENT LEVELS OF EPA AND DHA ON LIPIDS METABOLISM, GROWTH AND REPRODUCTIVE PERFORMANCE OF RICE FIELD EEL(MONOPTERUS ALBUS)

作　　者：朱长生[1] 江波[1] 周秋白[1] 

机构地区：[1]江西农业大学动物科学技术学院,南昌330045

出　　处：《水生生物学报》2013年第4期648-655,共8页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金(批准号:30860217);农业部淡水鱼类遗传育种和养殖生物学重点开放试验室开放基金(批准号:BM2007-10);江西省自然科学基金(批准号:2008GZN0025)资助

摘　　要：为研究EPA和DHA对黄鳝脂类代谢、生长及繁殖性能的影响,用添加有EPA和DHA比例相同(EPA/DHA=0.35)但水平不同(EPA和DHA总量分别为0.00%、0.35%、0.70%)的3种等氮等脂肪饲料,在常温(22—30℃)下,分别喂养平均体重为(21.71±0.54)g的黄鳝7周,分析黄鳝脂类代谢和生长性能,然后每组取15尾继续养殖至性腺发育成熟用于繁殖性能分析。结果表明:在饲料中添加0.70%的EPA和DHA能促进黄鳝生长,显著提高黄鳝的特定生长率(SGR)及肌肉粗蛋白含量,降低肝体指数(HSI)及肌肉、肝脏中的粗脂肪含量(P<0.05),显著提高亲鳝的性体指数(GSI)、产卵量、孵化率、幼苗的存活指数(SAI)(P<0.05)。添加0.35%的EPA和DHA能显著降低肝脏中粗脂肪含量(P<0.05)。综合分析表明:EPA和DHA能促进黄鳝的脂类代谢,显著提高其生长及繁殖性能;饲料中添加0.70%的EPA和DHA较为适宜。A feeding experiment was conducted to investigate the influences of EPA and DHA of dietary lipids on lipids metabolism,growth and reproductive performance of rice field eel（Monopterus albus Zuiew）.Fishes of which the average weight was（21.71±0.54） g were fed with three isonitrogenous and isolipidic experimental diets with the same EPA / DHA ratios（EPA∶DHA =0.35） but different amount of EPA and DHA（0.00%,0.35% and 0.70%,respectively） for seven weeks at room temperature ranging from 22℃ to 30℃,then the lipid metabolism and growth performance were analyzed.After that fifteen fishes from each group were took to keep until gonadal maturation for reproductive performance analysis.Results showed that the diet containing 0.70% of EPA and DHA could promote the growth of rice field eels and significantly increased the specific growth rate（SGR） and the protein content of muscle,but decreased the hepatosomatic index（HSI） and the fat content of liver and muscle（P〈0.05）.Significant increments of spawning quantity,gonadosomatic index（GSI）,hatch rates,survival activity index（SAI） were found in the diet containing 0.70% of EPA and DHA（P〈0.05）.No effects were observed on growth performance of rice field eel fed with the diet containing 0.35% of EPA and DHA,while such diet significantly decreased the fat content of liver（P〈0.05）.In conclusion,the EPA and DHA can promote lipids metabolism and improve the growth and reproductive performance of rice field eel（Monopterus albus Zuiew）.In the condition of this experiment,the optimal additive amount of EPA and DHA was 0.70%.

关 键 词：黄鳝 EPA DHA 脂类代谢 生长性能 繁殖性能 

分 类 号：S963.7[农业科学—水产养殖]